Return data from multiple tables

[Rafa³ Bielecki]

Hi there,

I have tables with such structure

transaction_YYM M
(idx,date,compa ny_id,value)

where YYMM stands for 2digits year and month
I want to define query (maybe view, procedure):
select * from [???] where date>='2007-01-01' and date<='2007-04-30'
which will grab data from
transaction_070 1
transaction_070 2
transaction_070 3
transaction_070 4
and return all as one

best regards
Rafal

[Dan Guzman]

Re: Return data from multiple tables

I want to define query (maybe view, procedure):

select * from [???] where date>='2007-01-01' and date<='2007-04-30'

A UNION ALL query will combine multiple result sets:

SELECT *
FROM dbo.transaction _0701
UNION ALL
SELECT *
FROM dbo.transaction _0702
UNION ALL
SELECT *
FROM dbo.transaction _0703
UNION ALL
SELECT *
FROM dbo.transaction _0704

You can specify an explicit column list (a Best Practice) and encapsulate
the query in a view to facilitate reuse. You might also consider creating a
partitioned view (or a partitioned table if you are running SQL 2005
Enterprise Edition). See the Books Online for more information.


--
Hope this helps.

Dan Guzman
SQL Server MVP

"Rafa³ Bielecki" <rafal@bielecki .infowrote in message
news:f2ubuk$i1o $1@nemesis.news .tpi.pl...

Hi there,
>
I have tables with such structure
>
transaction_YYM M
(idx,date,compa ny_id,value)
>
where YYMM stands for 2digits year and month
I want to define query (maybe view, procedure):
select * from [???] where date>='2007-01-01' and date<='2007-04-30'
which will grab data from
transaction_070 1
transaction_070 2
transaction_070 3
transaction_070 4
and return all as one
>
best regards
Rafal
>

[Rafal Bielecki]

Re: Return data from multiple tables


Uzytkownik "Dan Guzman" <guzmanda@nospa m-online.sbcgloba l.netnapisal w
wiadomosci news:JOz4i.2288 9$JZ3.9830@news svr13.news.prod igy.net...

A UNION ALL query will combine multiple result sets:
>
SELECT *
FROM dbo.transaction _0701
UNION ALL
SELECT *
FROM dbo.transaction _0702
UNION ALL
SELECT *
FROM dbo.transaction _0703
UNION ALL
SELECT *
FROM dbo.transaction _0704
>
You can specify an explicit column list (a Best Practice) and encapsulate
the query in a view to facilitate reuse. You might also consider creating
a partitioned view (or a partitioned table if you are running SQL 2005
Enterprise Edition). See the Books Online for more information.

thank you Dan, your help is very important to me
Rafal

[Erland Sommarskog]

Re: Return data from multiple tables

Rafa³ Bielecki (rafal@bielecki .info) writes:

I have tables with such structure
>
transaction_YYM M
(idx,date,compa ny_id,value)
>
where YYMM stands for 2digits year and month
I want to define query (maybe view, procedure):
select * from [???] where date>='2007-01-01' and date<='2007-04-30'
which will grab data from
transaction_070 1
transaction_070 2
transaction_070 3
transaction_070 4
and return all as one

In additions to Dan's response, I like to point out that from a logical
point of view, the above design is flawd. It's a lot easier to deal with a
single table. If there are enourmous volumes, it can still be motivated
with partitioning, but then we are talking enourmous values like tens
of millions of rows per month.



--
Erland Sommarskog, SQL Server MVP, esquel@sommarsk og.se

Books Online for SQL Server 2005 at

http://www.microsoft.com/technet/prodtechnol/sql/2005/downloads/books.mspx

Books Online for SQL Server 2000 at

http://www.microsoft.com/sql/prodinfo/previousversions/books.mspx